Notes tagged with Denomination

Most days art Critic Paul Carey-Kent spends hours on the train, traveling between his home in Southampton and his day job in Surrey. Could he, we asked, jot down whatever came into his head?

White Cube’s Masons Yard summer show includes six of Martin John Callanan’s striking series ‘The Fundamental Units’. Callanan uses thousands of exposures via a 3D optical microscope at the National Physical Laboratory to achieve intensely detailed (400 million pixels) images of the lowest denomination coins, here printed at over 50 times life-size. This elevation of the near-worthless reveals the construction and traces of circulation invisible to the naked eye. It also has a mournful aspect, as many of lowest value coins (Callanan has captured 16 of the 166 currently in use) will doubtless be withdrawn from circulation soon enough. As you can see at www.greyisgood.eu, Callanan has good form for obsessive projects, such as taking 2,000 photographs of floors in important buildings with restricted public access .

‘The Fundamental Units’ reminded me of a similarly-sourced but psychologically contrasting series : Moyra Davey’s late 80s series of 100 ‘Copperheads’, which concentrate on one coin – the US one cent – to show the range of scratching, rusting and tarnishing inflicted on the most famous American. These, focusing on one national economy at a time of recession – and currently on display at Tate Liverpool during the next recession – become harder to read as the damage tends towards abstraction. But then, isn’t the whole convention of money an abstraction of sorts?

Did you know that it costs the US Mint 2 cents to produce every 1 cent coin due to the cost of materials and production? Countries such as Canada have already done away with their lowest denomination coins due to their costs and lack of usefulness.

As these “worthless” coins cause debates in their governments about whether or not they should be abolished, photographer Martin John Callanan is on a mission to save them… not as a currency, but rather in photographs.

Martin John Callanan of the Slade School of Fine Art at University College London contacted the National Physical Laboratory (NPL) as he wanted to put together an exhibition featuring large images of the lowest denomination coins from around the world.

Petra Mildeova from NPL’s Advanced Engineered Materials Group demonstrated that full colour images could be taken using an infinite focus 3D optical microscope. Five coins were imaged (containing over 400 megapixels), allowing coins of less than 20 mm diameter to be printed as 1.2 m diameter images.

Martin John Callanan described the images as “really stunning” and is exhibiting them at the Galleria Horrach Moyà in Mallorca, Spain, in an exhibition entitled ‘The Fundamental Units‘ (referring to the smallest denomination of coins on display and not as a result of working with NPL, the home of fundamental constants in the UK). He now hopes to enhance his exhibition by imaging a further 161 coins, one from each of the other countries around the world that use them.

The images have attracted interest from the British Museum and were featured by New Scientist as their image of the day on 4 December 2012.

The mapping of large areas at very high resolution is becoming a more regular requirement. In fact, the capabilities of the microscope used to produce the images of the coins were barely stretched, as they were only in 2D. Using the Alicona Infinite Focus optical microscope NPL is able to acquire 3D datasets from large areas, which can be used to study worn surfaces on a gear, drill bit or metal punch and hence produce a detailed measurement of the volume of material lost by wear of the component. Such quantified volume measurements can then be used to determine the best material or operating practice for a given material grade.

The euro has taken a bit of a battering of late – and not just in the financial markets. As you can see for yourself above, the surface of a 1-cent coin, while smooth to the naked eye, is pitted and scarred when viewed through a powerful microscope.

To create this image, artist Martin John Callanan, a fellow at University College London based in the Slade Centre for Electronic Media in Fine Art, worked with Ken Mingard, Petra Mildeova and Eric Bennett at the UK’s National Physical Laboratory in London. The team used an optical microscope to create images of the lowest-denomination coins used in Australia, Burma, Swaziland and Chile, as well as the transnational euro. They took standard coins that had been in circulation and left the microscope to make 4000 tiny exposures overnight. It then took three days of processing to stitch these images together to create each final, 400-million-pixel version. The zoomable picture above is a low-resolution version.

The coin images are part of an ongoing series called The Fundamental Units in which Callanan explores “the atoms that shape the global economy”. Ultimately, the series will encompass all 166 of the world’s active currencies that use coins. The first five are on display as 1.2-by-1.2-metre prints, along with more of Callanan’s works, at the Galleria Horrach Moyà in Mallorca, Spain, until 17 January 2013.